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Posted 15 Feb 2013

Asychronous Web Service Call

, 21 Feb 2013
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Asynchronous Web Service Call


This tip gives us an idea to call methods of page in an asynchronous way.


To call method asynchronously, AJAX has to provide build ins example $.ajax( ).

Using the Code

Step 1

Create a simple AsychCall web page (.aspx). Create a web method, which we need to consume asynchronously like:

public static bool ExecuteReport(string reportingYear )
    bool returnvalue = true;
    int reportReturnValue = -1;
        reportReturnValue = GenerateReport.ReportGeneratereportingYear 
        if (reportReturnValue == -1)
            return false;
        return returnvalue;
    catch (System.Exception ex)
        return returnvalue;

Step 2

Create another webpage and place a button like:

     <asp:Panel ID="pnlReportStatusMsg" 

                runat="server" Visible="true">
         <input type="button" id="btnReportGenerate" 

                    value="Generate Report" onclick="executeReport();"

                        runat="server" />

Step 3

On the button click, call a JavaScript method "executeReport(); like:

       type: "POST",
       url: "/AsychCall.aspx/ExecuteReport",
       data: "{reportingYearKey:'" + FiscalYearValue }",
       contentType: "application/json; charset=utf-8",
       dataType: "json",
       success: function (msg) {
           if (msg.d == false) {
               document.getElementById('<%= lblReportStatus.ClientID %>').
               style.display = 'block';
               $("#<%=lblReportStatus.ClientID %>").text
               ("Report generation process is not enabled for selected
               reporting fiscal year, therefore please contact administrator
               for the corresponding changes.");
               document.getElementById('<%= btnReportGenerate.ClientID %>').
               disabled = false;
       error: function (request, status, error) {

Step 4

Compile this code. You see, when you click the button "Generate Report", AJAX method asynchronously calls Web method "ExecuteReport" from AsychCall Web page.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Pathak Ashwin
United States United States
This member doesn't quite have enough reputation to be able to display their biography and homepage.

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Comments and Discussions

QuestionSince this is specifically about async Pin
Marcus Kramer15-Feb-13 11:02
mvpMarcus Kramer15-Feb-13 11:02 

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